Wedding dress second-guess!!??

So I have a lot of anxiety and other mental health issues that cause extreme obsessive thinking. I recently bought a dress that was considerably outside my budget and I'm now second-guessing my choice. I felt rather overwhelmed and rushed (even though my appointment was an hour and a half) when at the bridal shop and my bridesmaids were hesitant to share their opinions to spare my overthinking brain and just let me make the choice that felt right. But in hindsight, I bought something beautiful that I'm not overly afraid that I really didn't want. I have 14 days to return/exchange it but the idea of going back and looking at new dresses makes me feel ashamed. I feel like I shouldn't invite my bridesmaids this time because its inconvenient for them and I don't want them to feel like I wasted their time. But if I go alone and pick a new dress, I don't want them to feel insulted or left out. So now I don't know what to do and as much as I tried to organize my feelings and thoughts on the matter, I just keep spiraling in stress-filled circles.